CVE intelligence and bounded remediation

CVE-2023-46381 — Loytec Linx-212 Firmware security vulnerability

High CVSS 8.2

LOYTEC LINX-151, LINX-212, LVIS-3ME12-A1, LIOB-586, LIOB-580 V2, LIOB-588, L-INX Configurator devices (all versions) lack authentication for the preinstalled version of LWEB-802 via an lweb802_pre/ URI. An unauthenticated attacker can edit any project (or create a new project) and control its GUI.

Severity
High
CVSS
8.2 (3.1)
Published
2023-11-04
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-306

Affected products

  • loytec / linx-212_firmware / 6.2.4
  • loytec / lvis-3me12-a1_firmware / 6.2.2
  • loytec / liob-586_firmware / 6.2.3

Matched remediation archetype

Authentication bypass and missing authentication

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Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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